3 years ago

The nearest integer of the square root of -105

Mathematics

1 answer:

nataly862011 [7]3 years ago

5 0

Answer:

Step-by-step explanation:

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Scores on a college entrance examination are normally distributed with a mean of 500 and a standard deviation of 100. What perce

Alla [95]

Answer:

The percentage is $P(350 < X 650 ) = 86.6\%$

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 500$

The standard deviation is $\sigma = 100$

The percent of people who write this exam obtain scores between 350 and 650

$P(350 < X 650 ) = P(\frac{ 350 - 500}{ 100}$

Generally

$\frac{X - \mu }{\sigma } = Z (The \ standardized \ value \ of \ X )$

$P(350 < X 650 ) = P(\frac{ 350 - 500}{ 100}$

$P(350 < X 650 ) = P(-1.5$

$P(350 < X 650 ) = P(Z < 1.5) - P(Z < -1.5)$

From the z-table $P(Z < -1.5 ) = 0.066807$

and $P(Z < 1.5 ) = 0.93319$

=> $P(350 < X 650 ) = 0.93319 - 0.066807$

=> $P(350 < X 650 ) = 0.866$

Therefore the percentage is $P(350 < X 650 ) = 86.6\%$

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3 years ago

This is for my Precalculus teacher and I am kinda confuse, help please!!

Andrews [41]

Answer:

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Drag a number to each box to complete the product. Numbers may be used more than once. 0.4764.7647.64764,760 Equation Product 47

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Answer:could you maybe simplify the question

Step-by-step explanation:

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Enrique and Yolanda collected 500 pieces of candy on Halloween. they gave half of their candy to charity. Yolanda took 180 piece

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500 − 250 = 250 pieces left after donation

Yolanda got 180 pieces....then Enrique got 70 pieces

So he got 70 /250 = 7/25 = 28% of the remaining candy

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Step-by-step explanation:

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